Elevated photography

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Elevated photography is the process of taking aerial photos using a telescoping pole or mast, or other aerial or elevated support systems, to emulate aerial photographs, or video, taken from a commercially licensed aircraft.

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In some ways, elevated photography is more flexible than imagery taken from a commercial aircraft, or an orbiting satellite, in that it is capable of getting highly detailed images, from a birds eye view. This method allows for image collection that offers synoptic timelines - making this process a useful tool for construction management, litigation, accident investigation, real estate promotion and much more.

The price and flexibility of elevated imaging is generally quite reasonable, and it includes varying degrees of compatibility with related engineering-quality software. Because it does not involve the use of a manned commercial aircraft, the overhead and costs associated with elevated photography should be much lower.

Elevated photography has been around for a few years; however, it is still relatively new in the United States and United Kingdom, but the concept of obtaining aerial images is not. Used extensively in areas outside the United States, it can be used in a variety of ways, but it serves as the link between getting a less than satisfying aerial image or becomes the next 'step up' from ground-level hand-held imagery.

Elevated photography is also commonly known as high-level photography and mast photography. It requires specialist equipment to carry out elevated photography safely and professionally, either van-mounted or portable masts are used, depending on location and job in hand.

One problem with elevated photography is that it is difficult to get an orthographic, or, map-like coverage of an area because most elevated photography systems only allow for a 'soda straw' way of collecting data. This can be offset by image stitching, to some degree, with new digital camera systems and software.

Multirotor photography

The most common configuration is the four-rotor quadcopter design, which is the newest platform for "elevated photography". This platform has become more practical because of recent developments and improvements in Lithium polymer battery and digital Brushless DC electric motor technology.

Civil aviation authorities, and model aircraft association insurance rules, restrict operations of radio-controlled aircraft, including multicopter-carrying cameras, to line of sight (LOS) operation. For all practical purposes, the range of operation of a multicopter, carrying a camera, is limited to a few hundred meters from the operator who is holding the radio control unit. The operational range of the most common, electric-powered multicopters are well-below the operational altitude and range of commercial aircraft, which are capable of conventional aerial photography using a larger, professional cameras that are hand-held by a camera operator, or, mounted inside a gyro-stabilized platform, which are mounted on the outside of the aircraft.

Cable-mounted camera systems

Skycam system set-up at a Washington Huskies football game, at Husky Stadium in Seattle, WA. Skycam Husky Stadium.jpg
Skycam system set-up at a Washington Huskies football game, at Husky Stadium in Seattle, WA.

Skycam is the original, elevated cable-controlled camera system that was invented by Garrett Brown in 1984; who also invented the body-mounted Steadicam system.

Because of its ability to carry heavy loads and provide smooth, precise camera movements and maintain steady camera positions, the Skycam and CableCam-type systems are primarily used as a remote-controlled camera, for mobile television productions, at major stadium events. The Skycam utilizes the buildings superstructure to anchor its cable and pulley system.

The cable-mounted Skycam system can also be installed outdoors, using construction cranes that are supported by light stainless steel guy-lines, [1] as was done in the 1984 Hollywood film "Birdy", starring Matthew Modine and Nicolas Cage.

Telescoping mast or pole photography

Mast or pole photography refers to low-level, ground-based elevated or aerial photography, using a telescopic mast or pole, with a remote-controlled camera attached to the mast head, which allows a photographer to capture still and motion picture imagery, from a "birds eye view". [2] [3]

Photo collage Mast Photography.jpg

There are numerous applications for elevated photography, including:

documenting the damage caused by natural & man-made disasters

The four main components of a mast or pole photography system are: (1) the telescoping mast or pole, (2) a high resolution digital camera that is, (3) controlled remotely with a smartphone or computer tablet running a mobile app, and (4) a remote controlled and powered pan/tilt head for pointing the camera.

Trailer-mounted telescoping mast in the extended position. Rig-and-car-web.jpg
Trailer-mounted telescoping mast in the extended position.
Trailer-mounted telescoping mast in the travel position Side-view-close-up-web.jpg
Trailer-mounted telescoping mast in the travel position

Telescoping masts come in various sizes, ranging from 20' to over 100' long or high, and can be extended, and retracted manually, mechanically or pneumatically. Mechanical masts rely on a series of simple pulleys and a 12volt electric winch to operate. Pneumatic systems incorporate a hand pump to pressurize the interior of the mast causing it to rise.

Smaller masts and poles, in 20' to 40' range, can be manually extended, locked-in-place by hand, and supported at the top-end with three guy-lines, by a single person; although having two persons involved is easier and safer.

Where speed-of-operation, portability and the ability to hoist heavier professional camera equipment are the main goals, the masts can be mounted on a specialized trailer for easy transport. The trailer mounted system is quick to set up, since no assembly is required at the site. The mast pivots near its center of gravity, requiring very little effort to move it from the travel position to the vertical position for shooting. The telescoping mast can also be mounted on a large car or a van. Larger masts can to be attached to a 4x4 vehicle for greater stability for greater safety.

Camera mounted on the pan/tilt Head Open-case-camera-up-web.jpg
Camera mounted on the pan/tilt Head
Wireless control unit with preview screen Ground-unit-web.jpg
Wireless control unit with preview screen

The remote control pan/tilt head allows the camera operator to position the camera, and frame the shot, by remotely pointing the camera up-and-down and side-to-side in order to achieve the right framing. Older remote control systems use a direct wire connection to the pan/tilt head to manually control the cameras position at the top-end. Modern kits use Wireless technology, like tablets and smartphones with Wifi, BlueTooth and mobile apps that control these components using radio frequency controls. Depending on the quality of the tilt-pan head, it can allows for more precise control and a greater range of movements of the pan-and-tilt controls.

The ground control unit, which is the user interface, can be a R/C hobby-type unit, or a specialized Mobile app running on a computer tablet or smartphone. It allows the photographer / operator to see what the camera sees, and being able to control the cameras position; which means framing, tilting, panning and zooming the lens in-and-out in order to compose the image; and then trigger the shutter.

Related Research Articles

Astrophotography Imaging of astronomical objects

Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, modern astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum photons over these long periods of time.

Steadicam Motion picture camera stabilizer mounts

Steadicam is a brand of camera stabilizer mounts for motion picture cameras invented by Garrett Brown and introduced in 1975 by Cinema Products Corporation. It mechanically isolates the camera from the operator's movement, allowing for a smooth shot, even when the operator moves over an irregular surface.

Telerobotics

Telerobotics is the area of robotics concerned with the control of semi-autonomous robots from a distance, chiefly using television, wireless networks or tethered connections. It is a combination of two major subfields, which are teleoperation and telepresence.

Aerial photography Taking images of the ground from the air

Aerial photography is the taking of photographs from an aircraft or other airborne platforms. When taking motion pictures, it is also known as aerial videography.

Professional video camera High-end camera for creating electronic moving images

A professional video camera is a high-end device for creating electronic moving images. Originally developed for use in television studios or with outside broadcast trucks, they are now also used for music videos, direct-to-video movies, corporate and educational videos, wedding videos, among other uses. Since the 2000s, most professional video cameras are digital professional video cameras.

Equatorial mount Mounting system for camera or telescope

An equatorial mount is a mount for instruments that compensates for Earth's rotation by having one rotational axis, the polar axis, parallel to the Earth's axis of rotation. This type of mount is used for astronomical telescopes and cameras. The advantage of an equatorial mount lies in its ability to allow the instrument attached to it to stay fixed on any celestial object with diurnal motion by driving one axis at a constant speed. Such an arrangement is called a sidereal or clock drive. Equatorial mounts achieve this by aligning their rotational axis with the Earth, a process known as "polar alignment".

Aerial survey Method of collecting geophysical data from high altitude aircraft

Aerial survey is a method of collecting geomatics or other imagery by using airplanes, helicopters, UAVs, balloons or other aerial methods. Typical types of data collected include aerial photography, Lidar, remote sensing and also geophysical data (such as aeromagnetic surveys and gravity. It can also refer to the chart or map made by analysing a region from the air. Aerial survey should be distinguished from satellite imagery technologies because of its better resolution, quality and atmospheric conditions. Today, aerial survey is sometimes recognized as a synonym for aerophotogrammetry, part of photogrammetry where the camera is placed in the air. Measurements on aerial images are provided by photogrammetric technologies and methods.

Tripod (photography) Provides for the stable formation of cameras

In photography, a tripod is a portable device used to support, stabilize and elevate a camera, a flash unit, or other videographic or observational/measuring equipment. All photographic tripods have three legs and a mounting head to couple with a camera. The mounting head usually includes a thumbscrew that mates to a female-threaded receptacle on the camera, as well as a mechanism to be able to rotate and tilt the camera when it is mounted on the tripod. Tripod legs are usually made to telescope, in order to save space when not in use. Tripods are usually made from aluminum, carbon fiber, steel, wood or plastic.

Aviation photography Images of aircraft, either in flight, or on the ground

Aviation photography is the act of taking images of aircraft, either in flight, or on the ground. Types of aviation photography include air-to-air, ground-to-air, ground-static, and remote photography. Military aviation photography, especially air-to-air, requires additional skills, as the photo and target aircraft often fly at velocities of over Mach 1, while under moderate to high G.

Skycam Three dimensional, cable-suspended camera

Skycam is a computer-controlled, stabilized, cable-suspended camera system. The system is maneuvered through three dimensions in the open space over a playing area of a stadium or arena by computer-controlled cable-drive system. It is responsible for bringing video game–like camera angles to television sports coverage. The camera package weighs less than 14 kilograms (31 lb) and can travel at 13 m/s (29 mph).

Image stabilization Techniques used to reduce blurring of images

Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure.

Tilt–shift photography Camera technique

Tilt–shift photography is the use of camera movements that change the orientation or position of the lens with respect to the film or image sensor on cameras.

Helicam R/C helicopter

The Helicam is a remote-controlled mini helicopter used to obtain aerial pictures or motion images using video, still or motion film cameras. The remote controlled camera mount system allows pan, tilt and roll movements. A wireless onboard video transmitter downlinks the live signal to the camera operator, images can be recorded on board, on the ground or both. The system is controlled by two operators with independent controls: the helicam pilot and camera operator.

First-person view (radio control)

First-person view (FPV), also known as remote-person view (RPV), or simply video piloting, is a method used to control a radio-controlled vehicle from the driver or pilot's view point. Most commonly it is used to pilot a radio-controlled aircraft or other type of unmanned aerial vehicle (UAV). The vehicle is either driven or piloted remotely from a first-person perspective via an onboard camera, fed wirelessly to video FPV goggles or a video monitor. More sophisticated setups include a pan-and-tilt gimbaled camera controlled by a gyroscope sensor in the pilot's goggles and with dual onboard cameras, enabling a true stereoscopic view.

Pan–tilt–zoom camera Type of video camera

A pan–tilt–zoom camera is a camera that is capable of remote directional and zoom control.

MineCam Remote exploration camera by I.A.Recordings

The MineCam is a remote exploration camera built by I.A.Recordings. It is used for mine shaft exploration and other similar environments. It was originally conceptualized in 1988, and since went under several design revisions. The name MineCam, is a pun on MiniCam, an early hand-held broadcast camera built by CBS Laboratories.

Aeryon Scout Type of aircraft

Aeryon Scout is a small reconnaissance unmanned aerial vehicle (UAV) that was designed and built by Aeryon Labs of Waterloo, Ontario, Canada. The vehicle was developed between 2007 and 2009 and produced from 2009-2015. Production has been completed and it is no longer advertised for sale on the company website.

Tripod head Part of a tripod system

A tripod head is the part of a tripod system that attaches the supported device to the tripod legs, and allows the orientation of the device to be manipulated or locked down. Modular or stand-alone tripod heads can be used on a wide range of tripods, allowing the user to choose which type of head best suits their needs. Integrated heads are built directly onto the tripod legs, reducing the cost of the tripod system.

Phantom (UAV) Popular prosumer series of UAVs marketed to photographers, surveyors and filmmakers

The Phantom is a series of unmanned aerial vehicles (UAVs) developed by Chinese technology company DJI.

In cinematography, remote heads, also known as 'hot' heads, or robos are motorized mechanical and/or electronic devices that are used as a mount for film, video or digital cinema cameras and can be controlled from a distance. In most cases this refers to control not only of the physical orientation of the camera body, such as pan (horizontal), tilt (vertical), roll, but also control over many or all camera functions – focus, zoom, color balance, gamma correction, camera menus and other related functions.

References

  1. Interview with Garrett Brown, by Wiki editor HamiltonFromAbove
  2. "BeltAir Industries, Inc. - Home". Archived from the original on 2009-08-15. Retrieved 2019-08-05.
  3. http://taitafalcon.blogspot.com/ [ user-generated source ]